Similarity parameters and a centrifugal convective instability of horizontally inhomogeneous circulations of the Hadley type
- 2 Downloads
The stability of the zonal axisymmetric quasi-geostrophic hydrostatic solution to the equations of atmospheric dynamics that is determined by the horizontal temperature gradient is studied. Time-dependent regions of unstable solutions specified by the Rayleigh number describe ordinary convective (baroclinic) processes and the long-term weak growth of disturbances under the action of the centrifugal forces arising from the Earth’s rotation. Comparison with a centrifugal hydrodynamic instability is made. The spatiotemporal structure of the corresponding geophysical fields is described.
KeywordsRayleigh Number Oceanic Physic Asymptotic Form Instability Region Baroclinic Instability
Unable to display preview. Download preview PDF.
- 1.A. E. Gledzer, E. B. Gledzer, F. V. Dolzhanskii, and V. M. Ponomarev, “Hadley and Rossby Regimes in a Simple Model of Convection of a Rotating Fluid,” Izv. Akad. Nauk, Fiz. Atmos. Okeana 42, 435–459 (2006) [Izv., Atmos. Ocean. Phys. 42, 399–422 (2006)].Google Scholar
- 4.F. V. Dolzhanskii and L. A. Pleshanova, “Simplest Nonlinear Model of Convection and Its Geophysical Application,” in Atmospheric Physics and Climate Problems, Ed. by G. S. Golitsyn and A. M. Yaglom (Nauka, Moscow, 1980), pp. 95–113 [in Russian].Google Scholar
- 5.D. Fultz, J. Kaiser, M. Fain, et al., “Experimental Investigations of the Spectrum of Thermal Convective Motions in Rotating Annulus,” Article 2B, Final Report, Contract AF 19(604)-8361, Dept. of Geophysical Sciences, Univ. of Chicago (1964).Google Scholar
- 7.E. N. Lorenz, The Nature and the Theory of the General Circulation of the Atmosphere (Geneva, 1967; Gidrometeoizdat, Leningrad, 1970).Google Scholar
- 9.G. I. Marchuk, Numerical Methods in Weather Forecasting, Leningrad, 1967) [in Russian].Google Scholar
- 12.A. S. Monin and A. M. Oboukhov, “Small Oscillations of the Atmosphere and the Adaptation of Meteorological Fields,” Izv. Akad. Nauk SSSR, Ser. Geofiz., No. 11, 1360–1373 (1958).Google Scholar